Ventilation grille for an air conditioner, air conditioner

Abstract

The application relates to the air conditioning technical field and discloses a ventilation grille for an air conditioner, which comprises a first ventilation area, the first ventilation area corresponds to a fan of the air conditioner, and the height of the first ventilation area matches the diameter of the fan; wherein the first ventilation area comprises n first grilles, the n first grilles are all arranged in an inclined mode, and the inclination angles of part of the first grilles are the same. The first ventilation area of the ventilation grille corresponds to the fan of the air conditioner, and the height of the first ventilation area matches the diameter of the fan, so that the first ventilation area at least covers the air inlet side of the fan of the air conditioner, that is, the area forming noise to the fan is covered, when the noise generated by the rotation of the fan is transmitted to the ventilation grille, the plurality of first grilles are arranged in different inclination angles, the noise can be shielded, the peak value noise can be effectively dispersed, the purpose of noise reduction is achieved, and the user experience is improved. The application further discloses an air conditioner.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, such as a ventilation grille for an air conditioner and an air conditioner. Background Technology

[0002] Currently, when the fan of an indoor air conditioner starts up, the rotating fan blades generate a certain amount of noise. A ventilation grille is installed on the air intake side of the indoor unit. As part of the air duct system of the indoor air conditioner, the ventilation grille's main function is to prevent people or animals from accidentally touching the fan blades and causing accidents.

[0003] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0004] In related technologies, the grille tilt angle of ventilation grilles is a uniform angle, which can only play a protective role, but cannot effectively block or reduce the noise generated when the fan is working.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a ventilation grille and an air conditioner for use in air conditioning, achieving a noise reduction effect.

[0008] In some embodiments, the ventilation grille for air conditioning includes:

[0009] The first ventilation zone corresponds to the air conditioner's fan, and the height of the first ventilation zone matches the diameter of the fan;

[0010] The first ventilation zone includes n first grilles, all of which are inclined, and some of the first grilles have the same inclination angle.

[0011] In some embodiments, the tilt angle of the first grille located at the top of the first ventilation zone is b.

[0012] Where D is the diameter of the fan, and L is the distance between the air inlet side of the fan and the first ventilation zone.

[0013] In some embodiments, the inclination angle of the first grille located at the bottom end of the first ventilation zone is c.

[0014] In some embodiments, the tilt angle of the first grille in the first ventilation zone gradually decreases along the direction from top to bottom.

[0015] In some embodiments, the decreasing magnitude of the tilt angle of the first grille in the first ventilation zone is...

[0016] In some embodiments, the centerline of the first ventilation zone is collinear with the axis of the fan.

[0017] In some embodiments, the ventilation grille further includes:

[0018] The second ventilation zone, located above the first ventilation zone, includes multiple inclined second grilles;

[0019] The tilt angle of the second grille is α. H1 is the height of the second ventilation zone.

[0020] In some embodiments, the ventilation grille further includes:

[0021] The third ventilation zone, located below the first ventilation zone, includes multiple inclined third grilles;

[0022] The tilt angle of the third grille is d. H2 is the height of the third ventilation zone.

[0023] In some embodiments, the tilt directions of the first grille, the second grille, and the third grille are matched.

[0024] In some embodiments, the air conditioner includes: the ventilation grille for air conditioning provided in the foregoing embodiments.

[0025] The ventilation grille and air conditioner for air conditioning provided in this disclosure can achieve the following technical effects:

[0026] The first ventilation zone of the ventilation grille corresponds to the air conditioner's fan, and the height of the first ventilation zone matches the diameter of the fan. This ensures that the first ventilation zone covers at least the air intake side of the air conditioner's fan, thus covering the area where the fan generates noise. When the noise generated by the fan blades reaches the ventilation grille, the multiple first grilles, set at different tilt angles, can not only block the noise but also effectively discretize the peak noise, achieving noise reduction and improving the user experience.

[0027] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0028] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0029] Figure 1 This is a schematic diagram of the structure of the ventilation grille and fan provided in the embodiments of this disclosure;

[0030] Figure 2 This is a solution diagram of the tilt angle of the first grille in the first ventilation zone provided in an embodiment of this disclosure;

[0031] Figure 3 This is a solution diagram of the tilt angle of the second grille in the second ventilation zone provided in an embodiment of this disclosure;

[0032] Figure 4 This is a solution diagram of the tilt angle of the third grille in the third ventilation zone provided in an embodiment of this disclosure.

[0033] Figure label:

[0034] 10: First ventilation zone; 101: First grille; 1011: Top first grille; 1012: Bottom first grille;

[0035] 20: Second ventilation zone; 201: Second grille;

[0036] 30: Third ventilation zone; 301: Third grille;

[0037] 40: Fan. Detailed Implementation

[0038] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0039] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0040] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0041] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0042] Unless otherwise stated, the term "multiple" means two or more.

[0043] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0044] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0046] Combination Figures 1 to 4 As shown, this embodiment of the present disclosure provides a ventilation grille for an air conditioner, including a first ventilation zone 10, the first ventilation zone 10 being disposed corresponding to the air conditioner fan 40, and the height of the first ventilation zone 10 matching the diameter of the fan 40; wherein, the first ventilation zone 10 includes n first grilles 101, all of the n first grilles 101 being inclined, and some of the first grilles 101 having the same inclination angle.

[0047] The ventilation grille provided in this embodiment corresponds to the air conditioner fan 40 in the first ventilation zone 10, and the height of the first ventilation zone 10 matches the diameter of the fan 40, so that the first ventilation zone 10 at least covers the air intake side of the air conditioner fan 40, that is, it covers the area where the fan 40 generates noise. Thus, when the noise generated by the fan blade rotation is transmitted to the ventilation grille, the multiple first grilles 101 are set at different tilt angles, which can not only block the noise, but also effectively discretize the peak noise, achieve the purpose of noise reduction, and improve the user experience.

[0048] The ventilation grille provided in this embodiment is applied to the air intake side of the fan 40 of the indoor unit of the air conditioner. In related technologies, the ventilation grille, as part of the air duct system of the indoor unit of the air conditioner, is only used to prevent people or animals from accidentally touching the fan blades of the fan 40 and causing accidents, and its function is singular.

[0049] The first ventilation zone 10 of the ventilation grille is positioned corresponding to the air conditioner fan 40, which can be understood as the first ventilation zone 10 being directly opposite the air conditioner fan 40. The height of the first ventilation zone 10 matches the diameter of the fan 40, which can be understood as the height of the first ventilation zone 10 being at least greater than or equal to the diameter of the fan 40, thus allowing the first ventilation zone 10 to cover the air intake side of the fan 40. In this way, when the fan 40 is operating and generating noise, the first ventilation zone 10 can cover the area generating noise, and based on the multiple first grilles 101 at different tilt angles, the noise is blocked, effectively discretizing peak noise.

[0050] The ventilation grille provided in this embodiment is rectangular. Optionally, the first grille 101 is arranged horizontally, and n first grilles 101 are arranged sequentially from top to bottom. The arrangement of the first grilles 101 must first satisfy the protective function of the ventilation grille.

[0051] Optionally, the n first grids 101 are evenly spaced.

[0052] In this embodiment, n is an integer, and n≥3. The specific value of n depends on the spacing between adjacent first grilles 101 and the height of the first ventilation zone 10. For example, n is 20, that is, the first ventilation zone 10 has 20 first grilles 101.

[0053] n first grilles 101 are arranged at an angle, and some of the first grilles 101 have the same angle of inclination. It should be noted that the inclination direction of the n first grilles 101 is roughly the same, so that airflow can flow in from the ventilation grilles. However, not all the first grilles 101 have the same angle of inclination. That is, some first grilles 101 have a large angle of inclination, while others have a small angle of inclination.

[0054] In this embodiment, by setting n first grilles 101 at different tilt angles, the first grilles 101 can block and reduce noise when the noise generated by the rotation of the fan blades of the fan 40 is transmitted to the first ventilation zone 10. In addition, the first grilles 101 at different tilt angles divide the air that transmits noise, and then guide and divert the sound-transmitting air to the corresponding direction through different tilt angles, thereby effectively discretizing the peak noise and achieving further noise reduction.

[0055] Optionally, the tilt angles of the n first grilles 101 can be set regularly or randomly.

[0056] Optionally, the first grille 1011 located at the top of the first ventilation zone 10 has an inclination angle of b. Where D is the diameter of the fan 40, and L is the distance between the air inlet side of the fan 40 and the first ventilation zone 10.

[0057] The first ventilation zone 10 is set directly opposite the fan 40. Within the area corresponding to the first ventilation zone 10, the noise emitted by the fan 40 during operation is the highest.

[0058] When the first ventilation zone 10 reduces the noise generated by the fan 40, the noise reduction effect is limited by the size of the fan 40 and the distance from the first grille 101 of the first ventilation zone 10 to the fan 40.

[0059] The tilt angle of the first grille 101 within the first ventilation zone 10 is designed separately, which helps to improve the noise reduction effect.

[0060] To better reduce noise and adapt to different models, the tilt angle of the first grille 1011 at the top of the first ventilation zone 10 is set to b. The value of b depends on the diameter of the fan 40 and the distance between the first ventilation zone 10 and the air inlet side of the fan 40. That is, For example, if D is 400 and L is 170, then b is 66.96°.

[0061] The first grille 1011, located at the top of the first ventilation zone 10, is at least flush with the upper edge of the fan 40, or may be higher than the upper edge of the fan 40. This ensures that the fan 40 is within the radiation range of the first ventilation zone 10.

[0062] Optionally, the first grille 1012 located at the bottom end of the first ventilation zone 10 has an inclination angle of c.

[0063] The first ventilation zone 10 is set directly opposite the fan 40. Within the area corresponding to the first ventilation zone 10, the noise emitted by the fan 40 during operation is the highest.

[0064] When the first ventilation zone 10 reduces the noise generated by the fan 40, the noise reduction effect is limited by the size of the fan 40 and the distance from the first grille 101 of the first ventilation zone 10 to the fan 40.

[0065] The tilt angle of the first grille 101 within the first ventilation zone 10 is designed separately, which helps to improve the noise reduction effect.

[0066] To better reduce noise and adapt to different models, the tilt angle of the first grille 1012 at the bottom of the first ventilation zone 10 is set to c. The value of c depends not only on the diameter of the fan 40 and the distance between the first ventilation zone 10 and the air inlet side of the fan 40, but also on the number of first grilles 101 in the first ventilation zone 10. That is, For example, if D is 400, L is 170, and n is 20, then c is 7.01°.

[0067] The first grille 1012, located at the bottom of the first ventilation zone 10, is at least flush with the lower edge of the fan 40, or may be lower than the lower edge of the fan 40. This ensures that the fan 40 is within the radiation range of the first ventilation zone 10.

[0068] It should be noted that the ventilation grilles are vertically arranged during use. Specifically, the first grille 1011 at the top of the first ventilation zone 10 and the first grille 1012 at the bottom of the first ventilation zone 10 refer to the first grille 1011 at the top and the first grille 1012 at the bottom when the ventilation grilles are in their vertical position. For example... Figure 3 As shown.

[0069] Optionally, the tilt angle of the n first grilles 101 in the first ventilation zone 10 gradually decreases along the direction from top to bottom.

[0070] To ensure the guiding and diversion effect of the intake airflow in the first ventilation zone 10, the tilt directions of the first grilles 101 in the first ventilation zone 10 are roughly the same. However, in order to reduce the noise generated by the fan 40, different tilt angles of the first grilles 101 are set, so that the first grilles 101 with different tilt angles can divide the air that transmits noise, and then guide and divert the sound-transmitting air in the corresponding directions through different tilt angles, thereby effectively discretizing the peak noise and achieving the purpose of noise reduction.

[0071] In this embodiment, the tilt angle of the first grille 101 in the first ventilation zone 10 gradually decreases from the top to the bottom. This avoids large differences in the tilt angles of different first grilles 101, or irregular designs, which could cause turbulence in the intake airflow and lead to greater noise.

[0072] That is, along the direction from top to bottom, the tilt angle of the first grille 101 of the first ventilation zone 10 gradually decreases, which helps the intake airflow to flow into the indoor unit in an orderly manner from the ventilation grille, avoiding turbulence and noise generation.

[0073] Optionally, the decreasing increment of the tilt angle of the n first grilles 101 in the first ventilation zone 10 is...

[0074] Along the direction from top to bottom, the inclination angle of the n first grilles 101 in the first ventilation zone 10 gradually decreases, and the decrease is... In this way, the relatively uniform and regular arrangement of the tilt angle of the first grille 101 in the first ventilation zone 10 not only ensures that the first grille 101 in the first ventilation zone 10 guides the airflow in a basically uniform manner, thus guaranteeing the overall stability of use; but also allows the first grille 101 at different tilt angles to divide the air that transmits noise, and then guides and diverts the sound-transmitting air to the corresponding directions through different tilt angles, effectively discretizing peak noise and achieving the purpose of noise reduction; and during the diversion, it can avoid the diverted air from becoming turbulent and generating noise.

[0075] Taking b = 66.96°, c = 7.01°, and n = 20 as an example, the decreasing range of the tilt angle of the 20 first grilles 101 in the first ventilation zone 10 is 3.3°.

[0076] Optionally, the centerline of the first ventilation zone 10 is set collinear with the axis of the fan 40.

[0077] The straight line perpendicular to the center of the first ventilation zone 10 is the centerline of the first ventilation zone 10. The centerline of the first ventilation zone 10 is set collinearly with the axis of the fan 40, which ensures that the first ventilation zone 10 and the fan 40 are directly aligned and avoids misalignment, thus affecting the noise reduction effect.

[0078] Optionally, the ventilation grille further includes: a second ventilation zone 20, located above the first ventilation zone 10, comprising a plurality of inclined second grilles 201; wherein the inclination angle of the second grilles 201 is α. H1 is the height of the second ventilation zone 20.

[0079] The second ventilation zone 20 is also a ventilation zone, but it is not directly opposite the fan 40. The noise generated by the fan 40 is not at its highest when it reaches the second ventilation zone 20. The second grille 201 of the second ventilation zone 20 is also inclined to assist the first ventilation zone 10 and further improve the noise reduction effect.

[0080] The second ventilation zone 20 is located above the first ventilation zone 10, and the air intake flow of the indoor unit fan 40 can be increased through the second ventilation zone 20.

[0081] The second grilles 201 of the second ventilation zone 20 are all inclined. Optionally, the inclination angles of the second grilles 201 in the second ventilation zone 20 are the same. When the noise generated by the rotation of the fan blades of the fan 40 is transmitted to the second ventilation zone 20, the second grilles 201 can block and reduce noise; in addition, by dividing the air that transmits noise through the inclined second grilles 201, and then guiding and diverting the sound-transmitting air in the corresponding inclined direction, the peak noise is discretized, thereby achieving a further noise reduction purpose.

[0082] To better reduce noise and adapt to different models, the tilt angle of the second grille 201 in the second ventilation zone 20 is set to 'a'. The value of 'a' depends on the height of the second ventilation zone 20 and the vertical distance between the first ventilation zone 10 and the air inlet side of the fan 40. That is, For example, if D is 400 and H1 is 257.5, then a is 56.5°.

[0083] It should be noted that the second grille 201 at the bottom of the second ventilation zone 20 is adjacent to the first grille 1011 at the top of the first ventilation zone 10. The inclination angle of the second grille 201 at the bottom of the second ventilation zone 20 is smaller than the inclination angle of the first grille 1011 at the top of the first ventilation zone 10.

[0084] Optionally, the ventilation grille further includes: a third ventilation zone 30, located below the first ventilation zone 10, comprising a plurality of inclined third grilles 301; wherein the inclination angle of the third grilles 301 is d. H2 is the height of the third ventilation zone 30.

[0085] The third ventilation zone 30 is also a ventilation zone, but it is not directly opposite the fan 40. The noise generated by the fan 40 is not at its highest when it reaches the third ventilation zone 30. The third grille 301 of the third ventilation zone 30 is also set at an angle to assist the third ventilation zone 30 and further improve the noise reduction effect.

[0086] The third ventilation zone 30 is located below the first ventilation zone 10. The third ventilation zone 30 can increase the air intake flow of the indoor unit fan 40.

[0087] The third grilles 301 in the third ventilation zone 30 are all inclined. Optionally, the inclination angles of the third grilles 301 in the third ventilation zone 30 are the same. When the noise generated by the rotation of the fan blades of the fan 40 is transmitted to the third ventilation zone 30, the third grilles 301 can block and reduce noise; in addition, by dividing the air that transmits noise through the inclined third grilles 301, and then guiding and diverting the sound-transmitting air in the corresponding inclined direction, the peak noise is discretized, thereby achieving a further noise reduction purpose.

[0088] To better reduce noise and adapt to different models, the tilt angle of the third grille 301 in the third ventilation zone 30 is set to d. The value of d depends on the height of the third ventilation zone 30 and the vertical distance between the first ventilation zone 10 and the air inlet side of the fan 40. That is, For example, if D is 400 and H2 is 223.6, then d is 52.7°.

[0089] It should be noted that the third grille 301 at the top of the third ventilation zone 30 is adjacent to the first grille 1012 at the bottom of the first ventilation zone 10. The tilt angle of the third grille 301 at the top of the third ventilation zone 30 is greater than the tilt angle of the first grille 1012 at the bottom of the first ventilation zone 10.

[0090] Optionally, when the heights of the second ventilation zone 20 and the third ventilation zone 30 are equal, the tilt angle of the second grille 201 of the second ventilation zone 20 is the same as the tilt angle of the third grille 301 of the third ventilation zone 30. Conversely, when the heights of the second ventilation zone 20 and the third ventilation zone 30 are not equal, the tilt angle of the second grille 201 of the second ventilation zone 20 is different from the tilt angle of the third grille 301 of the third ventilation zone 30.

[0091] Optionally, the tilt directions of the first grille 101, the second grille 201, and the third grille 301 are matched. This helps the intake airflow to flow orderly from the ventilation grilles into the indoor unit, avoiding turbulence and noise. In addition, it also prevents the first grille 101, the second grille 201, and the third grille 301 from intersecting or obstructing each other, causing turbulence in the intake airflow and resulting in greater noise.

[0092] The noise level generated by the air conditioner using the ventilation grille provided in this embodiment is compared with the noise level of air conditioners using ventilation grilles in related technologies as follows:

[0093] Ventilation grilles of related technologies The ventilation grille in this embodiment rotational speed Noise (decibels) Noise (decibels) 470 52.84 50.95 420 49.756 47.8 370 46.31 44.39

[0094] The comparison shows that using the ventilation grille provided in this embodiment can reduce noise by about 2 decibels.

[0095] Combination Figures 1 to 4 As shown, this disclosure provides an air conditioner, including a ventilation grille for the air conditioner as provided in the above embodiments. The ventilation grille for the air conditioner includes a first ventilation zone 10, which is disposed corresponding to the fan 40 of the air conditioner, and the height of the first ventilation zone 10 matches the diameter of the fan 40; wherein, the first ventilation zone 10 includes n first grilles 101, all of which are inclined, and some of the first grilles 101 have the same inclination angle.

[0096] The air conditioner provided in this embodiment has a first ventilation zone 10 corresponding to the air conditioner's fan 40, and the height of the first ventilation zone 10 matches the diameter of the fan 40, so that the first ventilation zone 10 at least covers the air intake side of the air conditioner's fan 40, that is, it covers the area where the fan 40 generates noise. Thus, when the noise generated by the fan blades is transmitted to the ventilation grille, the multiple first grilles 101 are set at different tilt angles, which can not only block the noise, but also effectively discretize the peak noise, achieve the purpose of noise reduction, and improve the user experience.

[0097] Noise propagates radially. This application addresses the noise generated during the air intake of an air conditioner by designing different tilt angles for the ventilation grilles in different areas, effectively reducing the noise during the air intake process.

[0098] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A vent grill for an air conditioner, characterized by, Comprising: A first ventilation area corresponding to the fan arrangement of the air conditioner, and the height of the first ventilation area matches the diameter of the fan, and the height of the first ventilation area is at least greater than or equal to the diameter of the fan; Wherein the first ventilation area comprises n first gratings, and the n first gratings are all arranged obliquely, and the inclination angles of some of the first gratings are the same, and the plurality of first gratings are arranged at different inclination angles.

2. The vent grill of claim 1, wherein, The inclination angle of the first grid located at the top end of the first ventilation area is b, ∠b=arctan ; Wherein D is the diameter of the fan, and L is the distance from the air inlet side of the fan to the first ventilation area.

3. The vent grill of claim 1, wherein, The inclination angle of the first grid located at the bottom end of the first ventilation area is c, ∠c = arctan ; Wherein D is the diameter of the fan, and L is the distance from the air inlet side of the fan to the first ventilation area.

4. The ventilation grating according to any one of claims 1 to 3, characterized in that, Along the direction from the top end to the bottom end, the inclination angles of the first gratings of the first ventilation area gradually decrease.

5. The ventilation grating according to claim 4, characterized in that, The decreasing amplitude of the inclination angle of the first grid of the first ventilation area is .

6. The ventilation grating according to claim 1, characterized in that, The center line of the first ventilation area is arranged in line with the axis of the fan.

7. The vent grill of claim 1, wherein, Further comprising: A second ventilation area located above the first ventilation area, comprising a plurality of obliquely arranged second gratings; Wherein, the inclination angle of the second grid is a, and ∠a=arctan , H1 is the height of the second ventilation area, and L is the distance between the air inlet side of the fan and the first ventilation area.

8. The vent grill of claim 1, wherein, Further comprising: A third ventilation area located below the first ventilation area, comprising a plurality of obliquely arranged third gratings; Wherein, the third grid's angle of inclination is d, ∠d=arctan , H2 is the height of the third ventilation area.

9. The ventilation grating according to claim 1, characterized in that, The inclination directions of the first gratings, the second gratings and the third gratings match.

10. An air conditioner characterized by comprising: Comprising the ventilation grating for the air conditioner according to any one of claims 1 to 9.

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